Composer 2vsDeepSeek-V4-Pro
Composer 2 | DeepSeek-V4-Pro | |
|---|---|---|
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 14% |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | 73.7% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 52.2% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 75% | — |
Competitive coding LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | — | 93.5% |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | 61.7% | — |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | — | 83.4% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 90.1% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1457 |
| Timeline | ||
| Release gap | Composer 2 shipped 36 days before DeepSeek-V4-Pro | |
| Overview | ||
| Company | Cursor | DeepSeek |
| Release date | Mar 19 2026 | Apr 24 2026 |
| Access | Proprietary | Open Weight |
Which is better: Composer 2 or DeepSeek-V4-Pro?
Composer 2 and DeepSeek-V4-Pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Composer 2 shipped 36 days before DeepSeek-V4-Pro, so benchmark comparisons should account for the intervening progress.
Composer 2 is proprietary, while DeepSeek-V4-Pro is open weight.
Direct benchmark comparisons are unavailable — Composer 2 and DeepSeek-V4-Pro don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 2 was released by Cursor on Mar 19 2026.
DeepSeek-V4-Pro was released by DeepSeek on Apr 24 2026.
Composer 2 is a proprietary model released by Cursor. DeepSeek-V4-Pro is an open weight model released by DeepSeek.
Other comparisons
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